Need help with a character

So I absolutely LOVE powerlisting, it is extremely helpful with making my ocs and has revealed to me all types of new powers.

But I've been experiencing a problem that I can't seem to remedy, and I was hoping someone could help.

See, I need to make a super hero for a roleplay. A traditional super hero, so the ability needs to be capable of not only killing people. Furthermore, it needs to be a basic ability and one that fits the theme of a good guy. Last but not least...Needs to be relatively underpowered.

So I tried blue fire manipulation, i figured it was basic, but the mere list of attacks proved overwhelming for how the rp needs to go. I just wanted opinions on a power that would fit the needed criteria. It needs to be simple, related to the theme of a good paragon-like hero, and needs to be relatively underpowered without a long list of applications, or atleast not too many applications.

Also it cannot be related to light-based or darkness-based abilities as the rp GM figured we already had too many people with that, and nothing overly violent, again, good guy.

You could make music with your hands. Properly applied, this can provide an excellent tool in hypnosis and can trigger certain things in the mind. Say, a certain combination of musical sounds makes the subject fall asleep. Naturally, the character would have to be a good fighter to hold their own in the field.